diff --git a/app/services/user.py b/app/services/user.py
index b0ea12c6..a5ade6a7 100644
--- a/app/services/user.py
+++ b/app/services/user.py
@@ -1,8 +1,8 @@
 from sqlalchemy.orm import Session
 
 from app.api.v1.schemas.user import ApiKeyPayload, CreditInfo, DetailData, UserPayload
-from app.utils import generate_id
 from netspresso.netspresso import NetsPresso
+from netspresso.utils.db.generate_uuid import generate_uuid
 from netspresso.utils.db.models.user import User
 from netspresso.utils.db.repositories.user import user_repository
 
@@ -19,7 +19,7 @@ def create_user(self, db: Session, email: str, password: str, api_key: str):
         return user
 
     def generate_api_key(self, db: Session, email: str, password: str) -> ApiKeyPayload:
-        generated_id = generate_id(entity="user")
+        generated_id = generate_uuid(entity="user")
 
         user = user_repository.get_by_email(db=db, email=email)
 
@@ -27,9 +27,7 @@ def generate_api_key(self, db: Session, email: str, password: str) -> ApiKeyPayl
             if user.password != password:
                 user.password = password
                 user.api_key = generated_id
-            elif user.api_key != generated_id:
-                user.api_key = generated_id
-            user = user_repository.save(db=db, model=user)
+                user = user_repository.save(db=db, model=user)
         else:
             user = self.create_user(
                 db=db,
diff --git a/app/utils.py b/netspresso/utils/db/generate_uuid.py
similarity index 63%
rename from app/utils.py
rename to netspresso/utils/db/generate_uuid.py
index eb04b7de..351da900 100644
--- a/app/utils.py
+++ b/netspresso/utils/db/generate_uuid.py
@@ -1,6 +1,6 @@
 from nanoid import generate
 
 
-def generate_id(entity: str, size: int = 10) -> str:
+def generate_uuid(entity: str, size: int = 10) -> str:
     nano_id = generate(size=size)
     return f"{entity}_{nano_id}"